cleaning corrision from proof coins

Vet

I have been looking back at some of my proof sets. today I pulled out a 1984 set that shows a few green spots, mostly around the rims. Is there a safe way to remove these spots without damage to the coins?



Larry

Bobk

Are they in the origional mint packs?

Vet

Yes they are ,And I hate to crack open origanal proofs 'but Im afraid I will loose them anyway if I don't get this stuff off.

GTOster

Your gona loose them
I have a few sets with the same green stuff on them
and the Lincoln is slowly being eaten away and ithas moved to the
other coins in the set
I cracked a set like I always do
And removed the coins into 2X2's and the green is there also
Sorry to bring bad news
Paul

Vet

So there is nothing that will clean it off or at least stop it from getting worse. I have sets from 1954 to today some I havn't looked at in years.HOPE i don't find many more in this state.

Larry

coinbuf

You can clean it off by using acetone but the proof surfaces will never be the same.

GTOster

Larry
I have tried to dip them but the spot came back
The only sets that I have seen run about 83 to present with the green spots
I wonder if it has anything to do with the Zink from the Lincoln?
I have not seen many earlyer set like this
Maybe someone else could be more helpful But I think they are all Drinking @ ANA
Paul

Vet

I was thinking acetone ,but I have never used anything to clean a coin.Hope your right about the older dates,I would hate to lose them.

Larry

DesertRat

I have a proof set, 1984 I think, that the lincoln was 60
% eaten away by green crud. All other coins are affected in spots. I acetoned the lincoln to see what would happen and it had no effect other than to dull the mirrors in the unaffected areas. I then dipped it and while the gren and corrosion was reduced significantly it did not in any way improve the coin. I 2x2'd the remaining coins and will keep an eye on them but I doubt they will be salvageable.